Xing Bo has an invincible ultimate move, but the opponent decided that using Holy Land would be more effective than Holy Sanctuary. The invincible defense is relative; if the offensive ultimate move comes with some absurd effects, penetrating invincible defense is not impossible.
Based on Xing Bo's understanding of Xiao Ji, the likelihood that the opponent's ultimate move contains such effects is almost one hundred percent.
In this situation, Holy Land is even more effective because it doesn't directly negate the attack but reduces massive damage which is then collectively borne by itself.
It seems unwise because if excessive damage is high enough, one could be killed by the overload damage too.
